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Home >> GMC >> 1995 >> Forward Control 7.4 N >> Repair and Diagnosis >> Engine Performance >> Specifications >> Engine Controls - Specifications - 7.4L >> Fuel System >> Minimum Idle Speed
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Minimum Idle Speed

NOTE: Minimum idle speed adjustment can only be performed on 7.4L engines. For minimum idle speed adjustment procedures, see ADJUSTMENTS article.
MINIMUM IDLE SPEED

Application (1) RPM
Automatic Trans. (2) 600-650
Manual Trans. (3) 675-725
(1) Idle speed with seated IAC is lower than specified if engine has less than 500 miles or when checked at altitudes above 1500 feet.
(2) Automatic transmission in Drive.
(3) Manual transmission in Neutral.
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